Hey, all.
First post...here goes.
Need some help troubleshooting a crank no start issue. I tried a search, but didn't find what I was looking for so if this has been asked before please let me know.
Anyway...
99 K1500 5.7 is cranking, but not starting. The steps I've taken so far are:
1) Tested fuel pressure - 55psi.
2) Tested for spark at all the cylinders - nothing.
3) Tested for spark from the coil to the cap - nothing.
4) Tested voltage to coil and ICM - good at 12V.
5) Checked signal from ICM to coil - good continuity.
6) Swapped coils with known good one, twice - nothing.
7) Swapped ICM with known good one - nothing.
? Checked switching signal from PCM to ICM - on with key in off position.
So, I stopped there because based on what I understand the switching signal is only suppose to be on when the engine is rotating. Why would it be on if the key is off?
